DBUH+I3 complex an efficient catalyst for the synthesis of 2-phenyl benzimidazole and benzothiazole derivatives

Herein, we have reported the facile synthesis of various benzimidazole / benzothiazole by using DBU-Iodine-Iodide as a green and simple catalyst. The R2NH+I3 complexes been formed reacting an aqueous mixture ammonium iodide molecular iodine with solution amine. structure has confirmed spectroscopic techniques. prepared amine-iodine screened catalyst in benzothiazoles. Among DBUH+I3complex found efficient benzimidazoles benzothiazoles achieved reaction o-phenylene diamine /o- amino thiophenol substituted aryl aldehyde DBUH+I3 present protocol offered some advantages over other protocols such mild condition, commercially available precursors, inexpensive catalyst, short time, broad scope substrate, high yield, isolation product, environmentally benign method.